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Building a GHG Emissions Calculation Tool
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Building a GHG Emissions Calculation Tool


A multinational manufacturer requested assistance from Antea Group to calculate greenhouse gas (GHG) emissions from its more than 60 worldwide facilities, including locations in Africa, Asia, Europe, North America, and South America. The manufacturer planned to publish its first Global Reporting Initiative (GRI) oriented sustainability report and requested support in developing the tools and methodology to report on the GRI indicators for energy and emissions.


We developed a workplan for each facility to calculate its direct energy consumption, indirect energy consumption, and GHG emissions for fiscal years 2007, 2008 and 2009. In accordance with the GRI G3 Guidelines, the methodology for our approach was based on The Greenhouse Gas Protocol: A Corporate Accounting and Reporting Standard (GHG Protocol).

The GHG inventory for the manufacturing locations was based primarily on monthly fuel and utility consumption data entered in the E-Metrics module, a utility recordkeeping function of our web-enabled information management system. Additional emissions resulting from manufacturing processes, vehicle operation, on-site refrigeration, and wastewater discharge, were estimated using the Facility GHG Inventory Tool developed by our team.


We facilitated the collection of data from all facilities into the Inventory Tool, and are working with our client to compile submitted information into a corporate inventory. Our client is currently moving forward with preparing its sustainability report, in which the GHG inventory will be reported.

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